Concrete, this is a dark gray tonal accented with a bright pastel of rainbow colors. The colors really pop against the gray! Every skein is dyed using professional acid dyes, and rinsed afterward. - Approx. 460 yards, 100 grams. - A 75/25 Merino Nylon blend for durability! - Machine washable, lay flat to dry. Tho I do recommend hand washing any knit items!Thank you for looking!